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Which of the following element has the highest first ionization energy:
- a)Rb
- b)Na
- c)K
- d)Sc
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Which of the following element has the highest first ionization energy...
Out of the four given elements Rb, Na, K belong to the s-block elements and Sc is a d-block element.
In the periodic table the arrangement of these elements is as follows
-s block-
Li Be
Na Mg -------- d block---------------------
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn
Rb Sr
Cs Ba
Fr Ra
Ionisation energy is inversely proportional to the atomic size.As we move from left to right in the periodic table the Ionisation energy increases, but as s-block elements are on the left of the periodic table, they show low values of Ionisation energy values.
Transition metals (d -block) have higher first Ionisation energies , because of small size and high nuclear charge, shielding effect of added electrons increases and this shielding effect tends to decrease the attraction due to the nuclear charge.These opposing factors lead to a gradual increase in the ionisation energy.
This is the reason why Sc has highest first Ionisation energy.
Most Upvoted Answer
Which of the following element has the highest first ionization energy...
In Sc 1st e remove from 4s2 orbital
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Which of the following element has the highest first ionization energy:a)Rbb)Nac)Kd)ScCorrect answer is option 'D'. Can you explain this answer?
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Which of the following element has the highest first ionization energy:a)Rbb)Nac)Kd)ScCorrect answer is option 'D'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about Which of the following element has the highest first ionization energy:a)Rbb)Nac)Kd)ScCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following element has the highest first ionization energy:a)Rbb)Nac)Kd)ScCorrect answer is option 'D'. Can you explain this answer?.
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